📄 value_t.htm
字号:
<html>
<head>
<!- Copyright (c) Go Ahead Software Inc., 1995-2000. All Rights Reserved. ->
<title>value_t -- basic</title>
<link rel="stylesheet" href="../../../style/doc.css" type="text/css">
</head>
<body>
<table width="550"> <tr><td>
<table border=0 width=100% cellspacing=0 cellpadding=0 CLASS="apiTitle">
<tr>
<td class="titleLeft" align=left width="33%"><b> value_t</b></td><td class="titleCenter" align=center width="33%"><b> basic</b></td><td class="titleRight" align=right width="33%"><B> EMF</B></td></tr>
</table><hr>
<h2>Synopsis</h2><p>Structure used to store all possible data types.</p><h2>Prototype</h2><pre>
#include "uemf.h"
typedef struct {
union {
char bool;
char byteint;
short shortint;
char percent;
long integer;
long hex;
long octal;
long big[2];
double floating;
char_t *string;
char *bytes;
char_t *errmsg;
void *symbol;
} value;
value_type_t type;
unsigned int valid;
unsigned int allocated; /* String was balloced */
} value_t;
typedef enum {
undefined = 0,
byteint = 1,
shortint = 2,
integer = 3,
hex = 4,
percent = 5,
octal = 6,
big = 7,
bool = 8,
floating = 9,
string = 10,
bytes = 11,
symbol = 12,
errmsg = 13
} value_type_t;
</pre><h2>Description</h2><p> The value_t type is used heavily in the GoAhead EMF database API. </p><H2>Example</H2><PRE>
/********************************************/
/*
* Initialize a boolean value.
*/
value_t valueBool(int value)
{
value_t v = VALUE_VALID;
v.type = bool;
v.value.bool = (char) value;
return v;
}
</PRE><h2>Stability Classification</h2><p>Stable.</p><h2></h2><h2></h2><h2></h2><h2></h2><h2>See Also</h2><p>
<A HREF="valueFree.htm">valueFree</A></p></td></tr></table>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -